Mold for making castings



I www@ Febi 19 1924.`

J. S. THQMPSON MOLD Foa MAKING cAsTINGs Filed nec. 23', 192s `JALMES S. THOMPSON, F PELE-lilith TIGRE.

MOLD BOB. MARN@ Application filed December 28, 1923. Serial No. 683,152.

To all 'ui/tom it may concern.'

Be it known that l, JAMES S. THOMPSON, a citizen oi the United States, residing at Pelham, in the county of l/Vestchester and State of New York, have invented certain new and useful linprovenients in Molds for Making Castings, oi which the following is a speciiication.

rlhis invention relates to permanent molds :tor making castings, and its object is generally to facilitate opening the mold after the metal has heen poured, and to enable this operation to he quickly and easily accomplished.

in making castings in permanent molds, the cope sometimes sticks to the drag and the casting and more or less diiiiculty is eX- perienced in opening the mold. This may also happen when the casting is provided with projections which may he located where they will add to the-difficulty of opening the mold.

l have found in practice that ii one end of the cope is kicked7 upy slightly, it will he sudicien't to break that sticking which sometimes occurs to a degree which makes it diihcult to open the mold, and since it is desirable that the mold should open easily when the time comes for opening it, with the least amount of exertion and without interrupting or 'delaying the progress of the workman who is opening a floor of molds, it is the object or my invention to provide each mold with means whereby the cope will he given a kick or jar to release it from sticking,- contact with the drag and casting preliminary to the opening operation.

And a Jiurther object of the invention is to provideV means to facilitate opening the mold which will impart this kick to the cope preliminary to the openingoperation.

in the accompanying drawings l have illustrated the invention Vin a simple form ot' mold adapted for castinghrake shoes, and referringthereto,-

Fig. l is a side elevation showing the mold in full lines in molding position and in broken lines with the cope kicked up slightly with reference to the drag.

Fig. 2 shows the mold in open position.

Fig. 3 is a top plan view of the mold shown in Fig. l.

Referring to the drawings the mold coinprises a draggr 5, and a cope 6 having a mold cavity 7. rl`he drap and cope are provided, at one end, with projections 8 and 9 to form the pouring gate l0, and the cope has an end ll to engage the other end l2 of the drag. n Fig. l have shown a brake shoe casting' intl drag and asis well known, such a casting` has an attaching lug i3 and end lugs 13 which project from the hack of the shoe and, in the 'form of mold illustrated, are formed in that part oi the meld cavity which is located in the cope, as shown in broken lines in Fig. 1.. There is a normal tendencv of the cope to stick to the dranp ot a 'permanent mold, and especially when tiey are made principally o1"- metal, alter the metal has been poured to form the casting', and the provision of projections on the casting extending; into the cope often tends to increase this sticking as hereinhetore indicated. lt is desirahle to swing` the cope in an arc as a simple and convenient method oi operiinpe,- the mold and it will he readily understood that the lahor of doing' this will he increased ii' the cope sticks to the drag and casting. Therefore, l provie a pair oi kickin l vers lli which are pivoted between thei nds at 14 on the sides of the drap: and project beneath lugs i5 at the end ot the cope opposite the pouring` The tree ends of these levers, the right ends shovn in the drawing, are adapted to he depressed in a suitable manner to raise the opposite ends of the levers and loosen or dislodge or lift the cope tree from the drag and casting as indicated in broken lines in liig. l, after which, it will he readily seen, the cope can he easily swung open position as shown in Fig. 2. The kicki g le s', which are so named because they impart a kick to the cope, may he operated hy di on them and exerting pressure througa o Weight of the workman, hut l; prefer aio provide mechanical means for this purpose, and l combine the kickingl lever operat'ng; means with the handle for swinging the cope to open position. This opemtinp, means comprises the handle i6 pivoted at l? to the cope and provided with cams i8 to engage the kicking levers. The projections 19 on the cope limit the movement of the cam lever so that it will normally stand in suhstantially upright position, as shown in Fig. l, and when the cope is open, as shown in Fig. 2, the lever may he permitted to engage a rest or support 2O to hold the cope in open position.

rlhus the handle is employed to operate the kicking levers and to swing the cope llG " ment to the. cope to open position, and the construction is prefer'ably such that these two operations are practically simultaneous, although the kick will precede any appreciable swinging movement of the cope.

` My invention provides a simple and easily operated means for loosening the cope to facilitate the removal of the cope from the drag, after the metal has been poured in the mold, and it will entirely overcome any sticking of the cope to the drag and casting due to the pouring operation. The broken lines in Fig. l show very clearly how the kicking levers operate to loosen the cope from the drag. lt is not necessary that the cope should be lifted as much as shown by the broken lines in Fig. l; on the other hand the conditions may be such that it becomes desirable to lift the cope as much, if not more, as shown by the broken lines in Fig. '1. My invention is adapted to accomplish these desirable results and it can be changed as found eX- pedient to impart a desired loosening movewhich, as before indicated, may vary 1n extent for different castings or because of other conditions. The invention greatly facilitates the operation of opening the mold which can be accomplished by a straight pull upon the lever; and as indicated in Fig. 2, the lever may be engaged with any sort of a support to maintain the cope in substantially upright position between casting operations.

l am aware that changes in the form, proportion and arrangement of parts may be made to adapt my invention to molds of different sizes, shapes and kinds for making different kinds of brake shoes or other castings, and l consider myself entitled to make all such changes as fairly fall within the spirit and scope of the invention.

I claim:

l. A permanent mold for making castings comprising a drag and a cope, a projection on the cope, and a lever on the drag adapted to be operated to engage the projection of the cope for loosening the cope from the drag and casting after the casting has been made.

2. A permanent mold for making castings comprising a drag and a cope, projections on the sides of the cope adjacent one end thereof, and levers pivotally mounted on the sides of the drag and adapted to be operated to engage the projections on the lcope for losening the cope from the drag and casting after the casting has been made.

3. A permanent mold for making castings comprising a drag and a cope, a. projection on the cope, a lever on the drag adapted to be operated to engage the projection on the cope for loosening the cope from the drag and casting after the casting has been made, and means on the cope for operating the leveron the drag.

1l. A permanent mold for making castings comprising a drag and a cope, a projection on the cope, a'flever on the drag adapted to be operated to engage the projection on the cope for loosening the cope from the drag and casting after the casting has been made, and a cam lever pivotally mounted on the cope for engaging and operating the lever on the drag. Y

5. A permanent mold for making castings comprising a drag and a cope, a projection on the cope, a lever pivotally mounted between its ends on the drag and having one end arranged to engage the projection on the cope, a cam pivotally mounted on the cope to engage the other end of the lever, and a handle for operating said cam.

6. A permanent mold for making castings comprising al drag and a cope, a pro jection on the cope at one end thereof, a leverl pivotally mounted between its ends on one side of the drag and having one end arranged beneath the projection on the cope, a cam pivotally mounted on the cope to engage the other end of the lever, and a handle connected with said cam for operating the cam.

7. A permanent mold for making castings comprising a drag and a cope, projections on the cope at one end thereof, levers pivotally mounted on the sides of the drag and having one end thereof arranged to engage the projections on the cope, cams pivotally mounted on the cope to engage the other ends of the levers, and handles projecting upward from thecope and engaged with, said cams for operating the cams.

JAMES s. frHoMrsoN, 

